She was a devoted disciple of the Indian spiritual master Meher Baba and was the subject of a film by musician Pete Townshend.

[1] de Leon received acclaim for her performance in Walter C. Hackett's The Barton Mystery, which later transferred to the West End.

[2] At a production of the musical comedy The White Horse Inn at the London Coliseum, de Leon met Indian spiritual master Meher Baba.

She would later describe the impact this meeting had on her stating it was like "as if someone had taken a hammer and knocked me on the head... During that week I went about like one in a dream: I was stunned with the wonder of Baba, nothing else existed for me.

[1][5] During the early thirties, de Leon, along with dancer Margaret Craske and Kitty Davy became known as "The Frivolous Three" and "Kimco" due to their increasing involvement with Baba.